| /** |
| * eCryptfs: Linux filesystem encryption layer |
| * Kernel declarations. |
| * |
| * Copyright (C) 1997-2003 Erez Zadok |
| * Copyright (C) 2001-2003 Stony Brook University |
| * Copyright (C) 2004-2008 International Business Machines Corp. |
| * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> |
| * Trevor S. Highland <trevor.highland@gmail.com> |
| * Tyler Hicks <tyhicks@ou.edu> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| * 02111-1307, USA. |
| */ |
| |
| #ifndef ECRYPTFS_KERNEL_H |
| #define ECRYPTFS_KERNEL_H |
| |
| #include <keys/user-type.h> |
| #include <linux/fs.h> |
| #include <linux/fs_stack.h> |
| #include <linux/namei.h> |
| #include <linux/scatterlist.h> |
| #include <linux/hash.h> |
| #include <linux/nsproxy.h> |
| |
| /* Version verification for shared data structures w/ userspace */ |
| #define ECRYPTFS_VERSION_MAJOR 0x00 |
| #define ECRYPTFS_VERSION_MINOR 0x04 |
| #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03 |
| /* These flags indicate which features are supported by the kernel |
| * module; userspace tools such as the mount helper read |
| * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine |
| * how to behave. */ |
| #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001 |
| #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002 |
| #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 |
| #define ECRYPTFS_VERSIONING_POLICY 0x00000008 |
| #define ECRYPTFS_VERSIONING_XATTR 0x00000010 |
| #define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 |
| #define ECRYPTFS_VERSIONING_DEVMISC 0x00000040 |
| #define ECRYPTFS_VERSIONING_HMAC 0x00000080 |
| #define ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION 0x00000100 |
| #define ECRYPTFS_VERSIONING_GCM 0x00000200 |
| #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ |
| | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ |
| | ECRYPTFS_VERSIONING_PUBKEY \ |
| | ECRYPTFS_VERSIONING_XATTR \ |
| | ECRYPTFS_VERSIONING_MULTKEY \ |
| | ECRYPTFS_VERSIONING_DEVMISC \ |
| | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION) |
| #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 |
| #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH |
| #define ECRYPTFS_SALT_SIZE 8 |
| #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2) |
| /* The original signature size is only for what is stored on disk; all |
| * in-memory representations are expanded hex, so it better adapted to |
| * be passed around or referenced on the command line */ |
| #define ECRYPTFS_SIG_SIZE 8 |
| #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2) |
| #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX |
| #define ECRYPTFS_MAX_KEY_BYTES 64 |
| #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 |
| #define ECRYPTFS_DEFAULT_IV_BYTES 16 |
| #define ECRYPTFS_FILE_VERSION 0x03 |
| #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 |
| #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 |
| #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 |
| #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ |
| #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) |
| #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 |
| #define ECRYPTFS_DEFAULT_NUM_USERS 4 |
| #define ECRYPTFS_MAX_NUM_USERS 32768 |
| #define ECRYPTFS_XATTR_NAME "user.ecryptfs" |
| |
| #define RFC2440_CIPHER_DES3_EDE 0x02 |
| #define RFC2440_CIPHER_CAST_5 0x03 |
| #define RFC2440_CIPHER_BLOWFISH 0x04 |
| #define RFC2440_CIPHER_AES_128 0x07 |
| #define RFC2440_CIPHER_AES_192 0x08 |
| #define RFC2440_CIPHER_AES_256 0x09 |
| #define RFC2440_CIPHER_TWOFISH 0x0a |
| #define RFC2440_CIPHER_CAST_6 0x0b |
| |
| #define RFC2440_CIPHER_RSA 0x01 |
| |
| /** |
| * For convenience, we may need to pass around the encrypted session |
| * key between kernel and userspace because the authentication token |
| * may not be extractable. For example, the TPM may not release the |
| * private key, instead requiring the encrypted data and returning the |
| * decrypted data. |
| */ |
| struct ecryptfs_session_key { |
| #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 |
| #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 |
| #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 |
| #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 |
| u32 flags; |
| u32 encrypted_key_size; |
| u32 decrypted_key_size; |
| u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; |
| u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; |
| }; |
| |
| struct ecryptfs_password { |
| u32 password_bytes; |
| s32 hash_algo; |
| u32 hash_iterations; |
| u32 session_key_encryption_key_bytes; |
| #define ECRYPTFS_PERSISTENT_PASSWORD 0x01 |
| #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 |
| u32 flags; |
| /* Iterated-hash concatenation of salt and passphrase */ |
| u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; |
| u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; |
| /* Always in expanded hex */ |
| u8 salt[ECRYPTFS_SALT_SIZE]; |
| }; |
| |
| enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; |
| |
| struct ecryptfs_private_key { |
| u32 key_size; |
| u32 data_len; |
| u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; |
| char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1]; |
| u8 data[]; |
| }; |
| |
| /* May be a password or a private key */ |
| struct ecryptfs_auth_tok { |
| u16 version; /* 8-bit major and 8-bit minor */ |
| u16 token_type; |
| #define ECRYPTFS_ENCRYPT_ONLY 0x00000001 |
| u32 flags; |
| struct ecryptfs_session_key session_key; |
| u8 reserved[32]; |
| union { |
| struct ecryptfs_password password; |
| struct ecryptfs_private_key private_key; |
| } token; |
| } __attribute__ ((packed)); |
| |
| void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); |
| extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); |
| extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); |
| |
| struct ecryptfs_key_record { |
| unsigned char type; |
| size_t enc_key_size; |
| unsigned char sig[ECRYPTFS_SIG_SIZE]; |
| unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; |
| }; |
| |
| struct ecryptfs_auth_tok_list { |
| struct ecryptfs_auth_tok *auth_tok; |
| struct list_head list; |
| }; |
| |
| struct ecryptfs_crypt_stat; |
| struct ecryptfs_mount_crypt_stat; |
| |
| struct ecryptfs_page_crypt_context { |
| struct page *page; |
| #define ECRYPTFS_PREPARE_COMMIT_MODE 0 |
| #define ECRYPTFS_WRITEPAGE_MODE 1 |
| unsigned int mode; |
| union { |
| struct file *lower_file; |
| struct writeback_control *wbc; |
| } param; |
| }; |
| |
| static inline struct ecryptfs_auth_tok * |
| ecryptfs_get_key_payload_data(struct key *key) |
| { |
| return (struct ecryptfs_auth_tok *) |
| (((struct user_key_payload*)key->payload.data)->data); |
| } |
| |
| #define ECRYPTFS_SUPER_MAGIC 0xf15f |
| #define ECRYPTFS_MAX_KEYSET_SIZE 1024 |
| #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 |
| #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 |
| #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ |
| #define ECRYPTFS_SALT_BYTES 2 |
| #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 |
| #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ |
| #define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64)) |
| #define ECRYPTFS_DEFAULT_CIPHER "aes" |
| #define ECRYPTFS_DEFAULT_KEY_BYTES 16 |
| #define ECRYPTFS_DEFAULT_HASH "md5" |
| #define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH |
| #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 |
| #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C |
| #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED |
| #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40 |
| #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 |
| #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 |
| #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 |
| #define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename |
| * as dentry name */ |
| #define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in |
| * metadata */ |
| #define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as |
| * dentry name */ |
| #define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as |
| * metadata */ |
| /* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >= |
| * ECRYPTFS_MAX_IV_BYTES */ |
| #define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16 |
| #define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */ |
| #define MD5_DIGEST_SIZE 16 |
| #define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE |
| #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED." |
| #define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23 |
| #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED." |
| #define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24 |
| #define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32) |
| |
| struct ecryptfs_key_sig { |
| struct list_head crypt_stat_list; |
| char keysig[ECRYPTFS_SIG_SIZE_HEX]; |
| }; |
| |
| struct ecryptfs_filename { |
| struct list_head crypt_stat_list; |
| #define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001 |
| u32 flags; |
| u32 seq_no; |
| char *filename; |
| char *encrypted_filename; |
| size_t filename_size; |
| size_t encrypted_filename_size; |
| char fnek_sig[ECRYPTFS_SIG_SIZE_HEX]; |
| char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1]; |
| }; |
| |
| /** |
| * This is the primary struct associated with each encrypted file. |
| * |
| * TODO: cache align/pack? |
| */ |
| struct ecryptfs_crypt_stat { |
| #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 |
| #define ECRYPTFS_POLICY_APPLIED 0x00000002 |
| #define ECRYPTFS_NEW_FILE 0x00000004 |
| #define ECRYPTFS_ENCRYPTED 0x00000008 |
| #define ECRYPTFS_SECURITY_WARNING 0x00000010 |
| #define ECRYPTFS_ENABLE_HMAC 0x00000020 |
| #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 |
| #define ECRYPTFS_KEY_VALID 0x00000080 |
| #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 |
| #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 |
| #define ECRYPTFS_KEY_SET 0x00000400 |
| #define ECRYPTFS_ENCRYPT_FILENAMES 0x00000800 |
| #define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00001000 |
| #define ECRYPTFS_ENCFN_USE_FEK 0x00002000 |
| u32 flags; |
| unsigned int file_version; |
| size_t iv_bytes; |
| size_t num_header_bytes_at_front; |
| size_t extent_size; /* Data extent size; default is 4096 */ |
| size_t key_size; |
| size_t extent_shift; |
| unsigned int extent_mask; |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat; |
| struct crypto_blkcipher *tfm; |
| struct crypto_hash *hash_tfm; /* Crypto context for generating |
| * the initialization vectors */ |
| unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; |
| unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; |
| unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; |
| struct list_head keysig_list; |
| struct mutex keysig_list_mutex; |
| struct mutex cs_tfm_mutex; |
| struct mutex cs_hash_tfm_mutex; |
| struct mutex cs_mutex; |
| }; |
| |
| /* inode private data. */ |
| struct ecryptfs_inode_info { |
| struct inode vfs_inode; |
| struct inode *wii_inode; |
| struct file *lower_file; |
| struct mutex lower_file_mutex; |
| struct ecryptfs_crypt_stat crypt_stat; |
| }; |
| |
| /* dentry private data. Each dentry must keep track of a lower |
| * vfsmount too. */ |
| struct ecryptfs_dentry_info { |
| struct path lower_path; |
| struct ecryptfs_crypt_stat *crypt_stat; |
| }; |
| |
| /** |
| * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint |
| * @flags: Status flags |
| * @mount_crypt_stat_list: These auth_toks hang off the mount-wide |
| * cryptographic context. Every time a new |
| * inode comes into existence, eCryptfs copies |
| * the auth_toks on that list to the set of |
| * auth_toks on the inode's crypt_stat |
| * @global_auth_tok_key: The key from the user's keyring for the sig |
| * @global_auth_tok: The key contents |
| * @sig: The key identifier |
| * |
| * ecryptfs_global_auth_tok structs refer to authentication token keys |
| * in the user keyring that apply to newly created files. A list of |
| * these objects hangs off of the mount_crypt_stat struct for any |
| * given eCryptfs mount. This struct maintains a reference to both the |
| * key contents and the key itself so that the key can be put on |
| * unmount. |
| */ |
| struct ecryptfs_global_auth_tok { |
| #define ECRYPTFS_AUTH_TOK_INVALID 0x00000001 |
| #define ECRYPTFS_AUTH_TOK_FNEK 0x00000002 |
| u32 flags; |
| struct list_head mount_crypt_stat_list; |
| struct key *global_auth_tok_key; |
| struct ecryptfs_auth_tok *global_auth_tok; |
| unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; |
| }; |
| |
| /** |
| * ecryptfs_key_tfm - Persistent key tfm |
| * @key_tfm: crypto API handle to the key |
| * @key_size: Key size in bytes |
| * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is |
| * using the persistent TFM at any point in time |
| * @key_tfm_list: Handle to hang this off the module-wide TFM list |
| * @cipher_name: String name for the cipher for this TFM |
| * |
| * Typically, eCryptfs will use the same ciphers repeatedly throughout |
| * the course of its operations. In order to avoid unnecessarily |
| * destroying and initializing the same cipher repeatedly, eCryptfs |
| * keeps a list of crypto API contexts around to use when needed. |
| */ |
| struct ecryptfs_key_tfm { |
| struct crypto_blkcipher *key_tfm; |
| size_t key_size; |
| struct mutex key_tfm_mutex; |
| struct list_head key_tfm_list; |
| unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; |
| }; |
| |
| extern struct mutex key_tfm_list_mutex; |
| |
| /** |
| * This struct is to enable a mount-wide passphrase/salt combo. This |
| * is more or less a stopgap to provide similar functionality to other |
| * crypto filesystems like EncFS or CFS until full policy support is |
| * implemented in eCryptfs. |
| */ |
| struct ecryptfs_mount_crypt_stat { |
| /* Pointers to memory we do not own, do not free these */ |
| #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 |
| #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 |
| #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 |
| #define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008 |
| #define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010 |
| #define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020 |
| #define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040 |
| u32 flags; |
| struct list_head global_auth_tok_list; |
| struct mutex global_auth_tok_list_mutex; |
| size_t num_global_auth_toks; |
| size_t global_default_cipher_key_size; |
| size_t global_default_fn_cipher_key_bytes; |
| unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE |
| + 1]; |
| unsigned char global_default_fn_cipher_name[ |
| ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; |
| char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; |
| }; |
| |
| /* superblock private data. */ |
| struct ecryptfs_sb_info { |
| struct super_block *wsi_sb; |
| struct ecryptfs_mount_crypt_stat mount_crypt_stat; |
| }; |
| |
| /* file private data. */ |
| struct ecryptfs_file_info { |
| struct file *wfi_file; |
| struct ecryptfs_crypt_stat *crypt_stat; |
| }; |
| |
| /* auth_tok <=> encrypted_session_key mappings */ |
| struct ecryptfs_auth_tok_list_item { |
| unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; |
| struct list_head list; |
| struct ecryptfs_auth_tok auth_tok; |
| }; |
| |
| struct ecryptfs_message { |
| /* Can never be greater than ecryptfs_message_buf_len */ |
| /* Used to find the parent msg_ctx */ |
| /* Inherits from msg_ctx->index */ |
| u32 index; |
| u32 data_len; |
| u8 data[]; |
| }; |
| |
| struct ecryptfs_msg_ctx { |
| #define ECRYPTFS_MSG_CTX_STATE_FREE 0x01 |
| #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02 |
| #define ECRYPTFS_MSG_CTX_STATE_DONE 0x03 |
| #define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04 |
| u8 state; |
| #define ECRYPTFS_MSG_HELO 100 |
| #define ECRYPTFS_MSG_QUIT 101 |
| #define ECRYPTFS_MSG_REQUEST 102 |
| #define ECRYPTFS_MSG_RESPONSE 103 |
| u8 type; |
| u32 index; |
| /* Counter converts to a sequence number. Each message sent |
| * out for which we expect a response has an associated |
| * sequence number. The response must have the same sequence |
| * number as the counter for the msg_stc for the message to be |
| * valid. */ |
| u32 counter; |
| size_t msg_size; |
| struct ecryptfs_message *msg; |
| struct task_struct *task; |
| struct list_head node; |
| struct list_head daemon_out_list; |
| struct mutex mux; |
| }; |
| |
| struct ecryptfs_daemon; |
| |
| struct ecryptfs_daemon { |
| #define ECRYPTFS_DAEMON_IN_READ 0x00000001 |
| #define ECRYPTFS_DAEMON_IN_POLL 0x00000002 |
| #define ECRYPTFS_DAEMON_ZOMBIE 0x00000004 |
| #define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008 |
| u32 flags; |
| u32 num_queued_msg_ctx; |
| struct pid *pid; |
| uid_t euid; |
| struct user_namespace *user_ns; |
| struct task_struct *task; |
| struct mutex mux; |
| struct list_head msg_ctx_out_queue; |
| wait_queue_head_t wait; |
| struct hlist_node euid_chain; |
| }; |
| |
| extern struct mutex ecryptfs_daemon_hash_mux; |
| |
| static inline struct ecryptfs_file_info * |
| ecryptfs_file_to_private(struct file *file) |
| { |
| return (struct ecryptfs_file_info *)file->private_data; |
| } |
| |
| static inline void |
| ecryptfs_set_file_private(struct file *file, |
| struct ecryptfs_file_info *file_info) |
| { |
| file->private_data = file_info; |
| } |
| |
| static inline struct file *ecryptfs_file_to_lower(struct file *file) |
| { |
| return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; |
| } |
| |
| static inline void |
| ecryptfs_set_file_lower(struct file *file, struct file *lower_file) |
| { |
| ((struct ecryptfs_file_info *)file->private_data)->wfi_file = |
| lower_file; |
| } |
| |
| static inline struct ecryptfs_inode_info * |
| ecryptfs_inode_to_private(struct inode *inode) |
| { |
| return container_of(inode, struct ecryptfs_inode_info, vfs_inode); |
| } |
| |
| static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) |
| { |
| return ecryptfs_inode_to_private(inode)->wii_inode; |
| } |
| |
| static inline void |
| ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) |
| { |
| ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; |
| } |
| |
| static inline struct ecryptfs_sb_info * |
| ecryptfs_superblock_to_private(struct super_block *sb) |
| { |
| return (struct ecryptfs_sb_info *)sb->s_fs_info; |
| } |
| |
| static inline void |
| ecryptfs_set_superblock_private(struct super_block *sb, |
| struct ecryptfs_sb_info *sb_info) |
| { |
| sb->s_fs_info = sb_info; |
| } |
| |
| static inline struct super_block * |
| ecryptfs_superblock_to_lower(struct super_block *sb) |
| { |
| return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; |
| } |
| |
| static inline void |
| ecryptfs_set_superblock_lower(struct super_block *sb, |
| struct super_block *lower_sb) |
| { |
| ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; |
| } |
| |
| static inline struct ecryptfs_dentry_info * |
| ecryptfs_dentry_to_private(struct dentry *dentry) |
| { |
| return (struct ecryptfs_dentry_info *)dentry->d_fsdata; |
| } |
| |
| static inline void |
| ecryptfs_set_dentry_private(struct dentry *dentry, |
| struct ecryptfs_dentry_info *dentry_info) |
| { |
| dentry->d_fsdata = dentry_info; |
| } |
| |
| static inline struct dentry * |
| ecryptfs_dentry_to_lower(struct dentry *dentry) |
| { |
| return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; |
| } |
| |
| static inline void |
| ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) |
| { |
| ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = |
| lower_dentry; |
| } |
| |
| static inline struct vfsmount * |
| ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) |
| { |
| return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; |
| } |
| |
| static inline void |
| ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) |
| { |
| ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = |
| lower_mnt; |
| } |
| |
| #define ecryptfs_printk(type, fmt, arg...) \ |
| __ecryptfs_printk(type "%s: " fmt, __func__, ## arg); |
| void __ecryptfs_printk(const char *fmt, ...); |
| |
| extern const struct file_operations ecryptfs_main_fops; |
| extern const struct file_operations ecryptfs_dir_fops; |
| extern const struct inode_operations ecryptfs_main_iops; |
| extern const struct inode_operations ecryptfs_dir_iops; |
| extern const struct inode_operations ecryptfs_symlink_iops; |
| extern const struct super_operations ecryptfs_sops; |
| extern struct dentry_operations ecryptfs_dops; |
| extern struct address_space_operations ecryptfs_aops; |
| extern int ecryptfs_verbosity; |
| extern unsigned int ecryptfs_message_buf_len; |
| extern signed long ecryptfs_message_wait_timeout; |
| extern unsigned int ecryptfs_number_of_users; |
| |
| extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; |
| extern struct kmem_cache *ecryptfs_file_info_cache; |
| extern struct kmem_cache *ecryptfs_dentry_info_cache; |
| extern struct kmem_cache *ecryptfs_inode_info_cache; |
| extern struct kmem_cache *ecryptfs_sb_info_cache; |
| extern struct kmem_cache *ecryptfs_header_cache_1; |
| extern struct kmem_cache *ecryptfs_header_cache_2; |
| extern struct kmem_cache *ecryptfs_xattr_cache; |
| extern struct kmem_cache *ecryptfs_key_record_cache; |
| extern struct kmem_cache *ecryptfs_key_sig_cache; |
| extern struct kmem_cache *ecryptfs_global_auth_tok_cache; |
| extern struct kmem_cache *ecryptfs_key_tfm_cache; |
| extern struct kmem_cache *ecryptfs_open_req_cache; |
| |
| struct ecryptfs_open_req { |
| #define ECRYPTFS_REQ_PROCESSED 0x00000001 |
| #define ECRYPTFS_REQ_DROPPED 0x00000002 |
| #define ECRYPTFS_REQ_ZOMBIE 0x00000004 |
| u32 flags; |
| struct file **lower_file; |
| struct dentry *lower_dentry; |
| struct vfsmount *lower_mnt; |
| wait_queue_head_t wait; |
| struct mutex mux; |
| struct list_head kthread_ctl_list; |
| }; |
| |
| #define ECRYPTFS_INTERPOSE_FLAG_D_ADD 0x00000001 |
| int ecryptfs_interpose(struct dentry *hidden_dentry, |
| struct dentry *this_dentry, struct super_block *sb, |
| u32 flags); |
| int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, |
| struct dentry *lower_dentry, |
| struct inode *ecryptfs_dir_inode, |
| struct nameidata *ecryptfs_nd); |
| int ecryptfs_decode_and_decrypt_filename(char **decrypted_name, |
| size_t *decrypted_name_size, |
| struct dentry *ecryptfs_dentry, |
| const char *name, size_t name_size); |
| int ecryptfs_fill_zeros(struct file *file, loff_t new_length); |
| int ecryptfs_encrypt_and_encode_filename( |
| char **encoded_name, |
| size_t *encoded_name_size, |
| struct ecryptfs_crypt_stat *crypt_stat, |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
| const char *name, size_t name_size); |
| struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); |
| void ecryptfs_dump_hex(char *data, int bytes); |
| int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, |
| int sg_size); |
| int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); |
| void ecryptfs_rotate_iv(unsigned char *iv); |
| void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
| void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
| void ecryptfs_destroy_mount_crypt_stat( |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |
| int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); |
| int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode); |
| int ecryptfs_encrypt_page(struct page *page); |
| int ecryptfs_decrypt_page(struct page *page); |
| int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry); |
| int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry); |
| int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); |
| int ecryptfs_read_and_validate_header_region(char *data, |
| struct inode *ecryptfs_inode); |
| int ecryptfs_read_and_validate_xattr_region(char *page_virt, |
| struct dentry *ecryptfs_dentry); |
| u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes); |
| int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code); |
| void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); |
| int ecryptfs_generate_key_packet_set(char *dest_base, |
| struct ecryptfs_crypt_stat *crypt_stat, |
| struct dentry *ecryptfs_dentry, |
| size_t *len, size_t max); |
| int |
| ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, |
| unsigned char *src, struct dentry *ecryptfs_dentry); |
| int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); |
| int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); |
| int ecryptfs_inode_set(struct inode *inode, void *lower_inode); |
| void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); |
| ssize_t |
| ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, |
| void *value, size_t size); |
| int |
| ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, |
| size_t size, int flags); |
| int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); |
| int ecryptfs_process_helo(uid_t euid, struct user_namespace *user_ns, |
| struct pid *pid); |
| int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns, |
| struct pid *pid); |
| int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid, |
| struct user_namespace *user_ns, struct pid *pid, |
| u32 seq); |
| int ecryptfs_send_message(char *data, int data_len, |
| struct ecryptfs_msg_ctx **msg_ctx); |
| int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, |
| struct ecryptfs_message **emsg); |
| int ecryptfs_init_messaging(void); |
| void ecryptfs_release_messaging(void); |
| |
| void |
| ecryptfs_write_header_metadata(char *virt, |
| struct ecryptfs_crypt_stat *crypt_stat, |
| size_t *written); |
| int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig); |
| int |
| ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
| char *sig, u32 global_auth_tok_flags); |
| int ecryptfs_get_global_auth_tok_for_sig( |
| struct ecryptfs_global_auth_tok **global_auth_tok, |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig); |
| int |
| ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, |
| size_t key_size); |
| int ecryptfs_init_crypto(void); |
| int ecryptfs_destroy_crypto(void); |
| int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm); |
| int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, |
| struct mutex **tfm_mutex, |
| char *cipher_name); |
| int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, |
| struct ecryptfs_auth_tok **auth_tok, |
| char *sig); |
| int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, |
| loff_t offset, size_t size); |
| int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, |
| struct page *page_for_lower, |
| size_t offset_in_page, size_t size); |
| int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, |
| size_t size); |
| int ecryptfs_read_lower(char *data, loff_t offset, size_t size, |
| struct inode *ecryptfs_inode); |
| int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, |
| pgoff_t page_index, |
| size_t offset_in_page, size_t size, |
| struct inode *ecryptfs_inode); |
| struct page *ecryptfs_get_locked_page(struct file *file, loff_t index); |
| int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); |
| int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid, |
| struct user_namespace *user_ns); |
| int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, |
| size_t *length_size); |
| int ecryptfs_write_packet_length(char *dest, size_t size, |
| size_t *packet_size_length); |
| int ecryptfs_init_ecryptfs_miscdev(void); |
| void ecryptfs_destroy_ecryptfs_miscdev(void); |
| int ecryptfs_send_miscdev(char *data, size_t data_size, |
| struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, |
| u16 msg_flags, struct ecryptfs_daemon *daemon); |
| void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx); |
| int |
| ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, |
| struct user_namespace *user_ns, struct pid *pid); |
| int ecryptfs_init_kthread(void); |
| void ecryptfs_destroy_kthread(void); |
| int ecryptfs_privileged_open(struct file **lower_file, |
| struct dentry *lower_dentry, |
| struct vfsmount *lower_mnt, |
| const struct cred *cred); |
| int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry); |
| int |
| ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, |
| size_t *packet_size, |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
| char *filename, size_t filename_size); |
| int |
| ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, |
| size_t *packet_size, |
| struct ecryptfs_mount_crypt_stat *mount_crypt_stat, |
| char *data, size_t max_packet_size); |
| int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat, |
| loff_t offset); |
| |
| #endif /* #ifndef ECRYPTFS_KERNEL_H */ |